Calendars 
vBulletin includes a powerful calendar system that can act in many ways, from a personal diary for individual board members to a schedule for forthcoming board events.

Using the Calendar Manager you can create a number of different calendars, add specific holidays and events, and create Calendar Moderators to oversee the use of each calendar.

In the same way as you can set permissions for forums, you can use the Calendar Manager to set permissions at a usergroup level for individual calendars and calendar types.
User Contributed Notes: Calendars Add a Comment